[bobthepanda]

Meaningful improvement is in the eye of the beholder. There's the old tale of how Google found out 500ms in latency was a 1% drop in traffic. http://glinden.blogspot.com/2006/11/marissa-mayer-at-web-20....

20 to 17 minutes is a 15% time savings still.

[lowercased]

25 hours to 20 minutes is insane. The process ran daily and only needed to run daily. 20->17 was unnecessary and a waste of time.

[lowercased]

Can't edit my post - posted too soon. 20 min -> 17 min was unnecessary for the client, but... 2 other people got to 'share' in the credit, because 'the team' got this down from 25 hours to 17 minutes. They got to learn something, after telling me it was 'impossible', but... that wasn't enough. They needed to put their fingerprints on it, then got to take credit for something. And took it they did. Annoying as hell, 15+ years later.